Jung Jung-Yeul, Joshi Punarvasu, Petrossian Leo, Thornton Trevor J, Posner Jonathan D
Departments of Mechanical and Aerospace Engineering, Arizona State University, Tempe, Arizona 85287, USA.
Anal Chem. 2009 Apr 15;81(8):3128-33. doi: 10.1021/ac900318j.
We present experimental measurements of electromigration current through a single cylindrical nanopore. A single cylindrical nanopore with 175 nm diameter was fabricated in silicon in series with two micropores with 2 and 100 microm diameters. Thick electrical double layers (EDLs) (kappa a approximately 1) exhibit current rectification due to asymmetric concentration polarization while thinner EDLs show nearly symmetric conductance. After the electric field is turned off, electrical current is measured and observed due to redistribution of ions in the concentration polarization layer.
我们展示了通过单个圆柱形纳米孔的电迁移电流的实验测量结果。在硅中制造了一个直径为175 nm的单个圆柱形纳米孔，该纳米孔与两个直径分别为2微米和100微米的微孔串联。厚的双电层（κa约为1）由于不对称的浓度极化而表现出电流整流，而较薄的双电层显示出几乎对称的电导。在电场关闭后，由于浓度极化层中离子的重新分布，可以测量和观察到电流。
